If we were to reflect on the journey of the human civilization, it has been a constant struggle, to understand the creation, fix inequities, seek justice, to arrive at a state of knowledge, when all of it makes sense. Humans ran into conflict, when they became greedy, deviated from the path of justice and equity, left people behind, held and or conceived themselves superior to others. They misunderstood the message of wise Ones, the prophets, the messengers and messages of the scriptures. Each society and or religion fell into the trap of exceptionalism.
Definition: Exceptionalism is the perception or belief that a species, country, society, institution, movement, individual, or time period is "exceptional". The term carries the implication, whether or not specified, that the referent is superior in some way.
The exceptionalism and its violent assertions has cause lots of divide in human society, over centuries, left lots of scars that have still not healed, while the current times have show propensity towards repeating history, by asserting its entitlement towards that exceptionalism.
We humans who believe in an intelligent and a fair creator, fail to see that the creator can only be fair in their attributes and will never pit set of creation over another. There have been clear statements in the scriptures many of us follow, that no one is superior over the other, except via good actions and piety.
The conflict comes due to the fact that we remain trapped in the siloed dogmas of old, do not think critically, fail to see the bigger picture, that the original and only, purpose of all faith and messages has been towards reform, to establish fairness, social justice and equity.
Once we apply the lens of social justice, equity and fairness for all in the ideas we profess, the stands we take, the intentions we make, we will realize that the veil has been lifted, we will realize, that it has indeed been "the" quest of humankind, of all faiths and religions. That realization also gives us a mental tool to filter out false and divisive ideologies. Realization dawns that we are and can indeed be one humanity, united by that common purpose.